GreSetDefaultArcParameters

GreSetDefaultArcParameters sets the arc parameters to the default values.

This function is supported by the graphics engine.

Syntax

GreSetDefaultArcParameters(hdc, pArcParms, pInstance, lFunction)

Parameters

hdc (HDC) - input

Device context handle.

pArcParms (PARCPARAMS) - input

Pointer to the default arc parameters.

Pointer to an ARCPARAMS structure:

lP P coefficient

lQ Q coefficient

lR R coefficient

lS S coefficient

pInstance (PVOID) - input

Pointer to instance data.

lFunction (ULONG) - input

High-order WORD=flags; low-order WORD=NGreSetDefaultArcParameters.

Return Code

fSuccess (BOOL) - returns

Return codes.

On completion, the handling routine must return BOOLEAN (fSuccess).

• TRUE Successful
• FALSE Error

Possible Errors Detected: When an error is detected, the graphics engine calls WinSetErrorInfo to post the condition. Reasons for failure of this function include:

• PMERR_HDC_BUSY
• PMERR_INV_HDC

Refer to the "Error Explanations" section of the Presentation Manager Programming Reference for further explanation.

Sample Code

#define INCL_GRE_DEVSUPPORT
#include <os2.h>

HDC           hdc;        /*  Device context handle. */
PARCPARAMS    pArcParms;  /*  Pointer to the default arc parameters. */
PVOID         pInstance;  /*  Pointer to instance data. */
ULONG         lFunction;  /*  High-order WORD=flags; low-order WORD=NGreSetDefaultArcParameters. */
BOOL          fSuccess;   /*  Return codes. */

fSuccess = GreSetDefaultArcParameters(hdc, pArcParms, pInstance, lFunction);